INPUT MULTIPLEXER - 2 STEREO INPUTS - SELECTABLE INPUT GAIN FOR OPTIMAL ADAPTATION TO DIFFERENT SOURCES ONE STEREO OUTPUT TREBLE, AND BASS CONTROL IN 2.0dB STEPS VOLUME CONTROL IN 1.0dB STEPS TWO SPEAKER ATTENUATORS: - TWO INDEPENDENT SPEAKER CONTROL IN 1.0dB STEPS FOR BALANCE FACILITY - INDEPENDENT MUTE FUNCTION ALL FUNCTION ARE PROGRAMMABLE VIA SERIAL BUS DESCRIPTION The is a volume tone (bass and treble) balance (Left/Right) processor for quality audio applications in TV systems. Selectable input gain is provided. Control of all the functions is accomplished by serial bus. BLOCK DIAGRAM

The AC signal setting is obtained by resistor networks and switches combined with operational amplifiers. Thanks to the used BIPOLAR/CMOS Technology, Low Distortion, Low Noise and DC stepping are obtained.

NOTE1: 1) The device is functionally good 5V. a step down, on Vs, to 4V does't reset the device. 2) BASS and TREBLE response: The center frequency and the response quality can be chosen by the external circuitry.

BA3714F : . The is a signal sensor consisting of a sensor circuit which detects the presence of an input signal, a logic circuit which controls an output drive circuit based on the input signal, and an output drive circuit. The signal sensor circuit employs the dual-wave rectified current method for excellent response. The outputs TE of Pin 3 and TON of Pin 5 can be respectively.

KIA6268P : = Dual Pre-Amp. Withbuilt-in Alc ;; Package = DIP-16.

M61311SP : Pre-Amplifiers.

M65575FP : Rhythm and Phrase Processors.

MV1822 : Pdc, VPS And Time Receiver.

NJM2235 : 3-Input Video Switch.

SM6451AVNIPPON : Audio Variable Volume ic. The a 3-wire serial-controlled electronic variable volume IC for audio applications. It provides electronic volume control for a stereo system (left and right channels), and independent channel attenuation and muting, with greatly enhanced digital zip noise suppression. The chip address function allows up to four SM6451AV devices to be connected and individually.

LM48822 : Ground-Referenced, Ultra-High PSRR, Ultra Low Noise, 35mW/Channel Stereo Headphone AMplifier With Common Mode Sense, And I2C Volume Control The LM48822 is a single supply, ground-referenced stereo headphone amplifier designed for portable devices, such as cell phones, where board space is at a premium. The LM48822 National’s ground-referenced architecture,.